Mern led the charge against Aegon's army alongside his kin. The combined might of the Reach and the Rock began to break the Targaryen host, but Aegon and his sisters, Visenya and Rhaenys, took to the sky with their dragons. The beasts killed 4,000 men of the combined army at the Field of Fire, among them Mern and his sons, grandsons, brothers, cousins, and other kin.[3] Another thousand men perished from sword and spears and arrows. One nephew of King Mern survived, but he died of his burns three days later, ending House Gardener.[2]